Accession Number:

ADA273879

Title:

Effect of Initial Imperfections on the Response of Cylinders to Underwater Shock

Descriptive Note:

Progress rept. 1 Oct 92-30 Sep 93,

Corporate Author:

NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

1993-09-30

Pagination or Media Count:

78.0

Abstract:

Presently, the United States Navy is searching for an improved method to predict the damage to a ship hull or underwater structure that results from an underwater explosion. One method of predicting this damage is through the use of nonlinear finite and boundary element analysis. Underwater Shock Analysis USA combined with VECDYNA3D is used for the analysis of the effect of explosive shock on numerical models. Initial imperfections are introduced in the numerical model using modal imperfections. The resulting numerical model is then subjected to a simulated underwater shock using the combined USADYNA3D code. A sensitivity analysis is performed to look into the details on the damage resulting from these simulations. Underwater shock, Initial imperfections

Subject Categories:

  • Marine Engineering
  • Explosions

Distribution Statement:

APPROVED FOR PUBLIC RELEASE